The Molten Salt Reactor Experiment building at Oak Ridge National Laboratory housed the reactor and offices for operating personnel. The facility was constructed in the 1950s for a nuclear aircraft project and was later expanded significantly and retrofitted to accommodate the MSRE. (Photo courtesy U.S. Department of Energy/Oak Ridge National Laboratory)

Note: This story was updated at 8:30 p.m.

Former director Alvin Weinberg once called it the greatest technical achievement at Oak Ridge National Laboratory. It was inspired by the campaign to build a nuclear-powered aircraft in the 1950s, and it was the first reactor to ever operate using uranium-233.

Now parts of the Molten Salt Reactor Experiment that are too radioactively “hot” for humans could be entombed in concrete.

For now, the idea is only under study, and there is no guarantee that any part of the Molten Salt Reactor Experiment, a nuclear historic landmark that has been dormant for decades, will be entombed.

But it’s one of the proposals being evaluated by the U.S. Department of Energy’s Oak Ridge Office of Environmental Management. The goal is to finish the evaluation by the end of the year.

Jay Mullis, manager of the Oak Ridge Office of Environmental Management, presented the proposal to the Oak Ridge City Council and Site Specific Advisory Board in two separate meetings earlier this month. The entombment proposal is one of five items being evaluated as part of a 45-day review started by DOE’s Environmental Management, or EM, program in June. [Read more…]

The U.S. Department of Energy’s Office of Nuclear Energy has selected ORNL’s Lou Qualls to serve as national technical director for molten salt reactors. (Photo courtesy DOE/ORNL)

By Jason Ellis, ORNL Communications

The U.S. Department of Energy’s Office of Nuclear Energy has selected Lou Qualls of Oak Ridge National Laboratory as the national technical director for molten salt reactors, or MSRs. In his new role, Qualls—a nuclear engineer who joined ORNL in 1988—will serve as a liaison among the nuclear industry, the national laboratory system, and DOE in defining the future of MSR technology in the United States.

The new position was created in response to the private sector’s growing interest in MSRs as the next generation of power reactors. A significant number of nuclear plants are expected to close beginning in 2030, with most closed by 2045, as their operating licenses from the Nuclear Regulatory Commission expire. Various companies are pursuing new reactor designs to replace this loss of nuclear energy, which is the nation’s largest source of carbon-free energy and represents approximately one-fifth of electricity generated in the United States.

“There are about 10 U.S. companies developing MSR designs in hopes of seeing their technologies make it onto the grid,” Qualls said. “My job is to work with these vendors and DOE to understand how each design could fit into the energy market and to identify hurdles that could prevent these reactors from ever delivering electricity. It’s a positive step that shows the level of excitement from industry, DOE, and the national labs.” [Read more…]

Representatives from Oak Ridge National Laboratory and Shanghai Institute of Applied Physics met at ORNL last week as part of an agreement between the two institutions to work together on the advancement of salt-cooled nuclear reactor technologies.

At the meeting, SINAP staff members were expected to describe their plans for building the first salt-cooled test reactor, and the two sides began planning the next steps in the shared research project.

The Cooperative Research and Development Agreement, or CRADA, between ORNL and SINAP focuses on accelerating scientific understanding and technical development of salt-cooled reactors, specifically fluoride salt-cooled high-temperature reactors, or FHRs. The project will draw on ORNL’s expertise in fuels, materials, instrumentation and controls, design concepts, and modeling and simulation for advanced reactors, as well as the lab’s experience in the design, construction and operation of the Molten Salt Reactor Experiment, the only molten salt reactor ever built. [Read more…]